Set includes 10 plugs: Φ1.08" (27.5 mm)~Φ1.58(3.8 mm) 1pcs; Φ0.89" (22.5 mm)~Φ1.3" (33.0 mm) 1pcs ; Φ0.71"(18.0 mm)~Φ1.1” *(28.0 mm) 1pcs; Φ0.55” (14.0 mm)~Φ0.86”(21.9 mm)2pcs; Φ0.26” (6.5 mm)~Φ0.58” (14.8 mm) 1pcs; Φ0.31” (8.0 mm)~Φ0.58” (14.8 mm) 2pcs; Φ0.16” (4.0 mm)~Φ0.58” (14.8 mm) 2pcs .It is recommended to have SeaLux Tapered Conical Wood Emergency Plugs for each 10' of boat length. Set of true, softwood cone shaped safety plugs in various heights and diameters, to conform to the irregular and unpredictable shapes of a hull breach. Made of Tapered soft wood for a snug watertight fit, these are drilled for permanent attachment to your fittings. Tether a sized wooden plug to each fitting ready to pound into place in case of failure or leakage. Pack contains plugs made to suit most popular skin fittings. These are temporary or emergency plugs for your boat where water would enter a circular, oval, or irregular hole caused by maintenance failure or hull breach due to impact. A 2” hole in your boat, only 1 foot below the waterline would fill a 55 gallon drum in 40 seconds. Bilge pumps cannot keep up. You must stop the water.