The NUPROL Airsoft Maintenance Kit is a must have for any airsoft gas blow back enthusiast. This kit includes everything needed to keep your GBB replicas in top working order. Included: Plastic Lubricant Oil (60ml) Oil Remover (60ml) Pump (for the oil remover) Cleaning Brush Stick-Easy (18g) Silicone Grease (10g) Gear Grease (10g) Bearing Oil (10ml) Cleaning cloth