Optikinetics Solar 250 Effects and Accessories 3" Cassettes B+W Cassettes Optikinetics 7141£10 / £10 Optikinetics 7143£10 / £10 Optikinetics 7142£10 / £10 Optikinetics 7146£10 / £10 Optikinetics 7147£10 / £10 Optikinetics 7149£10 / £10 Optikinetics 7150£10 / £10