If keeping a wick from going off centre is becoming a nightmare for you then try out the yarley mould accessory kitits strong its durable and frustration free balance out your wick against the small groove and seal it with the screws if you get wick holes plug them up using the mould sealer that comes with it suitable for moulds 9cm or smaller approximately 35 inchescontains 2 wick bars 2 screws and mould sealeruseful for beginnersyarley mould accessory kit