FDCTSD R12/R134a AC Caps Assortment 100PC — 12 Sizes, Leakproof Sealing Rings, Clear Organizer

FDCTSD 100PCS R12 R134a AC Caps Assortment is a complete 12-size set of pressure port dust caps and valve-core covers that provide leak-resistant sealing and organized storage for most vehicle A/C systems.

This kit gathers 100 service port caps in twelve commonly used sizes to fit both R12 and R134a air conditioning fittings. Housed in a clear compartmentalized box, the assortment replaces individual spare parts and reduces time spent searching for the right cap during maintenance. Constructed from corrosion-resistant plastic and featuring integrated sealing rings on most sizes, the set aims to keep dust, moisture, and contaminants out of service ports while resisting under-hood heat and pressure.

Which ports and refrigerants do these caps fit?

These caps are designed to cover a broad range of high- and low-pressure A/C service ports that use the R12 or R134a refrigerants. The assortment includes sizes that match standard OEM thread patterns and popular aftermarket fittings, making it suitable for many domestic and import vehicles.

• 12 distinct cap sizes to match common service port diameters
• Compatible with both R12 and R134a valve stems
• Includes fuel pressure relief valve caps for additional applications
• Most caps include built-in sealing rings for airtight closure

How does the kit protect A/C systems during storage and repair?

The caps create a physical barrier that prevents dirt, moisture and small debris from entering service ports when valves are exposed. Sealing rings on most pieces form a snug, leak-resistant fit that reduces the chance of slow refrigerant loss and contamination while vehicles sit or undergo work.

• Integrated sealing rings on the majority of caps for a tight seal
• Pressure- and waterproof design tolerates under-hood conditions
• Plastic construction resists corrosion and avoids rust issues
• Prevents particulate ingress during repairs and storage

What makes the storage box and organization useful for technicians?

The clear, compartmentalized organizer keeps all 12 sizes separated and visible, saving time when selecting the correct cap. A durable plastic box with a hook option allows wall mounting or bench storage, so caps remain orderly and accessible at the point of service.

• Transparent lid for quick visual inventory checks
• Individual compartments prevent cross-mixing of sizes
• Compact footprint fits tool cabinets or wall hooks
• One SKU replaces multiple loose parts in inventory

How durable are these caps under real-world conditions?

Manufactured from corrosion-resistant plastic, the caps are built to withstand heat, humidity, and exposure typical inside engine bays without rusting or cracking. Their pressure-resistant form ensures continued protection even when systems heat up during operation.

• High-grade plastic resists deformation and cracking
• Non-metallic composition eliminates corrosion risk
• Designed to tolerate under-hood temperatures and pressure
• Long service life reduces repeat replacements

Who is this for: The FDCTSD 100-piece R12/R134a cap assortment is suited for professional mechanics, mobile technicians, and DIY vehicle owners who service multiple makes and models. If you need a single, organized kit to replace lost caps, stock a shop, or carry for on-the-road repairs, this set simplifies parts management and helps maintain clean, sealed A/C and valve ports.