Features & Benefits eBOOST™ increases the lubricity and anti-wear properties of A/C oil and rejuvenates rubber seals and O-ringsSpotgun cartridge-type ESTER oils utilize the Spotgun injectionsystem to inject a precise measured amount of A/C OilSpotgun Cartridge Hybrid ESTER OilViscosity: 100Unit size: 4 oz/120 mlQuantity: 1