FlushLock Locking Well Plugs feature the highest security, lowest profile of well plugs available today. FlushLock features leak-proof Quad 4 sealing system and unique hidden access point for special security key. Next generation, bright safety orange locking well plugs free up space in well casing or manhole, and use no metal parts or padlocks. Domed top shuttles liquids away from your monitor well and features the industry standard “No Fill,” “Test Well” and triangle symbol clearly and boldly printed on top. Available in 2 inch (50 mm) and 4 inch (100 mm), both in schedule 40 and 80. www.kobyenviro.com