Check the listing for details. OILER BRASS 1/8" BSP 20 ML DROP SIGHT TYPE SUITE MODEL ENGINES. Condition: New. Listed at 18.88 USD. OILER BRASS 1/8" BSP 20 ML DROP SIGHT TYPE SUITE MODEL ENGINES PRODUCT DESCRIPTION BRASS AND GLASS OILER 20ML 1/8" BSP threaded fitting Glass bowl 1.1/8" round x 1.1/2" high These Oilers are true Engine Drip Feeder Oilers. The bodies are fully machined cast brass and are made from original dimensions. These are a direct replacement for most Oilers and truly look as if they were. The oil cups are made brass and Glass for full view, all parts are machined. Drip Feed Oilers: Drip Feed Oilers are Single Point Lubricators and are mounted directly on the Lubrication Points. These oilers dispense oil by gravity from transparent reservoir through Needle Valve. The Needle Valve is joined with Toggle Pin by which the Operator can on / Off the flow manually. The flow of the oil is controlled by adjusting the needle Valve and can be visualized from the in-built Sight Glass.