The PRO Performance Minipump HV is a high volume minipump

and precise-shifting

microcellular urethane (MCU) elastomers

If you are looking for the best in comfort and protection against perineal discomfort then the Serfas

Muc-Off Drivetrain Cleaner: 500ml Pourable/Spray Bottle pickuponly The PRO Performance Minipump HVThe Muc Off Bio Drivetrain Cleaner is a complete drivetrain cleaning solution that can either be poured into a chain cleaning device or sprayed directly to your chain rings, rear cassettes and derailleurs to clean your entire drivetrain within seconds. It's also fully biodegradable and safe for metal, plastic, rubber and seals. Fast and effective grease cutting formula Removes all chain oil and wax residue Safely Eliminates drive chain contaminants